Nullpointerexception when trying to instantiate Datepicker (com.vaadin.flow.component.datepicker.DatePicker)

It is a bit odd, but I get straight up Nullpointerexception when I try to instantiate DatePicker component :

DatePicker date = new DatePicker("Select date", LocalDate.now());

Just like that, I enter the line (I already tried different parameters in the constructor and also default constructor with nothing in it), and my application does not launch due to Nullpointer...

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lectureForm' defined in file [D:\IDEAProjects\university\target\classes\com\university\ui\views\forms\LectureForm.class]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.university.ui.views.forms.LectureForm]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:313)
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:294)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1358)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1204)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:893)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.university.Main.main(Main.java:13)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.university.ui.views.forms.LectureForm]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:217)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:309)
	... 25 common frames omitted
Caused by: java.lang.NullPointerException: null
	at com.vaadin.flow.component.datepicker.DatePicker.<init>(DatePicker.java:85)
	at com.university.ui.views.forms.LectureForm.configureFormComponents(LectureForm.java:126)
	at com.university.ui.views.forms.LectureForm.<init>(LectureForm.java:68)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:204)
	... 27 common frames omitted

Line 85 (and it is always that line) in DatePicker is

this.setLabel(label);

in

 public DatePicker(String label, LocalDate initialDate, ValueChangeListener<ComponentValueChangeEvent<DatePicker, LocalDate>> listener) {
        this(initialDate);
        this.setLabel(label);
        this.addValueChangeListener(listener);
    }

And so I don't have any ideas why this is happening, why it is always the same constructor (regardless of parameters), why the problem is with the label and, most importantly, how to fix it (-:

Thank you very much in advance

The source of the problem was unexpectably Spring Boot, that I used to run application.
In IDE (IntelliJ IDEA) lines where in incorrect order, but marked with links. So Nullpointerexception was really thrown not at the label setting, but when method UI.getCurrent() was called, and DataPicker tried to set locale. Due to Spring (@SpringComponent), Vaadin UI was not yet built when method call arrived, and so the return was null. Solution : add @UIScope annotation to the class.